ASRock P4i945GC Quick Installation Guide - Page 13
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Serial ATA (SATA) Power Cable (Optional) connect to the SATA HDD power connector connect to the power supply USB 2.0 Headers (9-pin USB6_7) (see p.2 No. 17) (9-pin USB4_5) (see p.2 No. 18) Please connect the black end of SATA power cable to the power connector on each drive. Then connect the white end of SATA power cable to the power connector of the power supply. Besides four default USB 2.0 ports on the I/O panel, there are two USB 2.0 headers on this motherboard. Each USB 2.0 header can support two USB 2.0 ports. Internal Audio Connector (4-pin CD1) (CD1: see p.2 No. 24) Front Panel Audio Header (9-pin HD_AUDIO1) (see p.2 No. 22) This connector allows you CD1 to receive stereo audio input from sound sources such as a CD-ROM, DVD-ROM, TV tuner card, or MPEG card. This is an interface for front panel audio cable that allows convenient connection and control of audio devices. 1. High Definition Audio supports Jack Sensing, but the panel wire on the chassis must support HDA to function correctly. Please follow the instruction in our manual and chassis manual to install your system. 2. If you use AC'97 audio panel, please install it to the front panel audio header as below: A. Connect Mic_IN (MIC) to MIC2_L. B. Connect Audio_R (RIN) to OUT2_R and Audio_L (LIN) to OUT2_L. C. Connect Ground (GND) to Ground (GND). D. MIC_RET and OUT_RET are for HD audio panel only. You don't need to connect them for AC'97 audio panel. E. Enter BIOS Setup Utility. Enter Advanced Settings, and then select Chipset Configuration. Set the Front Panel Control option from [Auto] to [Enabled]. 13 ASRock P4i945GC Motherboard English